CVE-2024-21386: 
C# vulnerability analysis and mitigation

.NET Denial of Service Vulnerability, identified as CVE-2024-21386, was discovered and affects multiple versions of Microsoft's ASP.NET Core and Visual Studio 2022. The vulnerability was initially disclosed on February 13, 2024, with Microsoft Corporation as the assigning CNA. The affected versions include ASP.NET Core versions 6.0.0 to 6.0.27, 7.0.0 to 7.0.16, and 8.0.0 to 8.0.2, as well as Visual Studio 2022 versions from 17.4.0 to 17.4.16 (NVD).

The vulnerability has been assigned a CVSS v3.1 Base Score of 7.5 (High) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. This scoring indicates that the vulnerability can be exploited over the network, requires low attack complexity, needs no privileges or user interaction, and has a high impact on availability while maintaining unchanged scope. The vulnerability has been classified under CWE-400 (Uncontrolled Resource Consumption) by Microsoft Corporation (NVD).

The primary impact of this vulnerability is on system availability, as indicated by the CVSS scoring which shows high availability impact (A:H) while having no direct impact on confidentiality (C:N) or integrity (I:N). The vulnerability can lead to a denial of service condition in affected .NET applications (NVD).

Microsoft has released security updates to address this vulnerability. Ubuntu has also provided fixes for affected versions, with updates available for Ubuntu 23.10 (mantic) and 22.04 LTS (jammy) in packages dotnet6 (6.0.127-0ubuntu1), dotnet7 (7.0.116-0ubuntu1), and dotnet8 (8.0.102-8.0.2-0ubuntu1) (Ubuntu Security).